If you’re in development mode I believe I encountered the same issue a week ago!

It’s not LiveView failing in a mysterious and dramatic fashion, but the LiveReload detecting a new asset in /priv/static/images and reloading your dev server.

I moved the dynamic images to a subfolder, say /priv/static/images/uploads and modified my config/dev.exs file’s live_reload pattern to be:

config :example, ExampleWeb.Endpoint,
  live_reload: [
    patterns: [
      ~r"priv/static/(?!images/uploads).*(js|css|png|jpeg|jpg|gif|svg)$",
      ...
    ]
  ]

Note that we’ve added the (?!images/uploads). bit to the first pattern to have it ignore files within the images/uploads subdirectory.